高含硫味精废水处理的研究

采用吹脱－混凝－厌氧消化－两段ＳＢＲ－絮凝沉淀工艺处理味精废水，试验结果表明，当进水ＣＯＤ为２２３５１ｍｇ／Ｌ，ＳＯ＾２－４５１００００ｍｇ／Ｌ，ＮＨ３－Ｎ７５７１ｍｇ／Ｌ、色度（倍）３９０６和ＰＨ１．３时，出水ＣＯＤ９９ｍｇ／Ｌ、ＳＯ＾２－４９５ｍｇ／Ｌ、ＮＨ３－Ｎｌｍｇ／Ｌ色度１６和ＰＨ６．５，其水质均达到ＧＢ８９７８－１９９６规定的一级排放标准。     

Greening the Congressional record: environmental social movements and expertise-based access to the policy process

ABSTRACT

A new dataset of organizational testimony at U.S. Congressional hearings on environmental protection is used to examine how social movement organizations use issue expertise to gain access to the policy process. Environmental movement organizations (EMOs) are shown to testify in greater numbers at hearings that consider proposed legislation, compared to hearings that are exploratory or investigatory in nature. The increased representation at legislative hearings is unique to EMOs; other kinds of organizations do not obtain similar increases in legislative access. These findings suggest that, due to their scientific expertise and perceived legitimacy, EMOs receive privileged access to the policy process relative to other organizations affected by environmental policy and at a later stage than has been proposed by prior work examining social movement access to the policy process.     

处理高浓度氨氮废水的研究

采用新型吹脱汽提-超声波联用技术，对高浓度氨氮废水的处理进行了研究，结果表明，吹脱汽提-超声波联用技术处理效果大于两者单独使用的效果之和。另外，研究中还考察了填料的使用、pH条件、温度、气液比和处理时间的影响，以利选择最优的处理条件。     

Performance of adaptive cluster sampling estimators in a multivariate setting

Adaptive cluster sampling has been proven to perform well in a univariate setting, but it may not perform well when there are several parameters of interest. The efficiency of adaptive sampling when there are several variables of interest depends on the relationship of the variables with one another.     

DIE‐OFF OF PATHOGENIC E. COLI O157:H7 IN SEWAGE CONTAMINATED WATERS1

E. coli O157:H7 is a pathogen that can be present in sewage contaminated waters. This organism poses a health risk for humans who come in contact with these waters via drinking, swimming, or shellfish consumption. A risk assessment model is needed to evaluate or quantify this risk. One possibility is the use of a computer model to simulate the fate and transport of E. coli O157:H7 downstream from a discharge point [e.g., a separate sanitary sewer overflow (SSO)]. However, this computer model would require input data regarding characteristics of this organism, which have not been previously available. One necessary input parameter is the rate at which die off of this organism occurs in a stream or river environment. Several studies were conducted to evaluate the die‐off rate of E. coli O157:H7 in an SSO impacted stream. Indicator bacteria (total coliforms, E. coli, and enterococci) were evaluated simultaneously. The results suggest that E. coli O157:H7 is not persistent — decay rates are high relative to the indicator bacteria. However, the decay plots suggest a biphasic response: initial decay is rapid, followed by an attenuated, slower decay. Hence traditional simulation methods using a single, first‐order decay rate may be inaccurate.     

建筑退让道路红线与城市消防安全布防探讨

后退道路红线,除具有城市景观布置、人流物流疏导等一般城市属性作用外,担负着抢险救灾、战争等众多涉及消防安全布防的重要功能.后退道路红线规划管理的严重滞后,对城市消防安全形成了严重挑战,是城市消防管理的重大遗漏.本文对后退道路红线与城市消防安全布防的内在关系进行了梳理,厘清了建筑控制线失控的原因,给出了解决这一问题的清晰路线图,以期能在今后城市建设及城市消防安全管理和布防的理论、规划和实践中加以匡正.     

地质灾害能量质环理论结构模式梗概

以地质灾害能量形成致灾根源为研究导向,论表观灾害形成机理的基础上,从灾害能量质环理论到地质灾害致灾根源作进一步升华探索.运用能量质环理论有针对性地加强对于地震、洪水、泥石流等各种地质灾害能量在介质中传播规律的研究；构建灾害能量传输、聚集成无数能量质点、质点相吸形成环链、环链相交形成能量断面,各个能量断面叠加形成能量破坏体,能量破坏体不断地传输与演化直至最终诱发下一次灾害等全过程循环系统；分析灾害能量在介质中传输及演变规律；提出灾害隔断原理,对防灾减灾工程提出实质性的建议.该项目研究打破了传统的非根源防灾理念,从致灾根源探索灾害的形成及灾害隔断预警.     

大冶铁矿电力机车高压安全保护装置的改进

武钢大冶铁矿运输车间使用的是ZG150-1500型工矿电力机车,该电力机车原有1套高压保护装置,但是设计上局限于受电弓升落的控制,忽视了受电弓不能正常复位情况下的防触电保护功能,运输车间技术人员进行攻关,改进电力机车高压安全保护装置,增设高压接地保护设施,杜绝了电力机车高压触电事故发生,取得较好效果.     

安全工程专业实验课程体系设置研究

以中国劳动关系学院安全工程专业为例,探讨其实验课程体系设置问题,认为实验课分为基础实验课、专业基础实验课、特色实验课3部分。笔者分别论述各部分课程的内容、学时以及不同年级学时分配情况;强调专业实验课程的设置应依托安全工程专业的培养计划,在保证基础实验课的基础上,根据学校的实际情况开设体现学科优势的特色实验课;优化实验课程体系,增加综合性设计性实验比例,加强实验室管理,建立完善的实验室管理制度,为培养创新人才奠定基础。     

Describing and Mapping Human-Induced Vegetation Change in the Australian Landscape

Australian reporting requirements for native vegetation require improved spatial and temporal information on the anthropogenic effects on vegetation. This includes better linkage of information on vegetation type (e.g., native vegetation association), extent and change, vegetation condition, or modification. The Vegetation Assets, States and Transitions (VAST) framework is presented as a means for ordering vegetation by degree of anthropogenic modification as a series of condition states, from a residual or base-line condition through to total removal. The VAST framework facilitates mapping and accounting for change and trends in the status and condition of vegetation. The framework makes clear the links between land management and vegetation condition states, provides a mechanism for describing the consequences of land management practices on vegetation condition, and contributes to an understanding of resilience. VAST is a simple communication and reporting tool designed to assist in describing and accounting for anthropogenic modification of vegetation. A benchmark is identified for each vegetation association. Benchmarks are based on structure, composition, and current regenerative capacity. This article describes the application of the VAST framework as a consistent national framework to translate and compile existing mapped information on the modification of native vegetation. We discuss the correspondence between these compiled VAST datasets at national and regional scales and describe their relevance for natural resource policy and planning.